1. Drucker PF. Management Challenges for the 21st Century. New York: Harper Business; 2001
2. Peters TJ, Waterman RH. In Search of Excellence: Lessons from America's Best-Run Companies. New York: Harper & Row; 1982
3. McKay M, Davis M, Fanning P. Messages: The Communication Skills Book. New Harbinger: Oakland. CA; 1995
4. Daňková A, Droppa M. The impact of National Culture on working style of Slovak managers. Procedia Economics and Finance. 2015;34:164-171
5. Bačík R, Mihal J, Fedorko R. The analysis of the impact of selected communication channels on the selected city population opinion. Polish Journal of Management Studies. 2015;12(2):7-14